Check out this website, has a lot of great resources for Photo Booth Companies.

If you are looking for a great business idea with low overhead, and low cost of entry, try  a Photo Booth company.

There are large franchises you can buy into like Shutterbooth.  Or you can just buy your own booth from a company like dslrphotobooth.

There are a lot of companies out there to buy supplies from like Picture Perfect Supply and Photo Booth Frames 

Of course you can check Twitter, google, facebook and other resources as well for great ideas.
Best of Luck in 2015.